Office chair



FIG. 1 is a perspective view of a first embodiment of a chair;

FIG. 2 is a front view of the first embodiment;

FIG. 3 is a right view of the first embodiment;

FIG. 4 is a left view of the first embodiment;

FIG. 5 is a rear view of the first embodiment;

FIG. 6 is a top view of the first embodiment; and,

FIG. 7 is a bottom view of the first embodiment.

The broken lines shown are for environmental purposes only and form no part of the claimed design. 

The ornamental design for an office chair, as shown and described. 